/*
 * #%L
 * HAPI FHIR - Core Library
 * %%
 * Copyright (C) 2014 - 2025 Smile CDR, Inc.
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */
package ca.uhn.fhir.rest.gclient;

import ca.uhn.fhir.rest.server.exceptions.NotModifiedException;
import org.hl7.fhir.instance.model.api.IBaseResource;

public interface IReadIfNoneMatch<T extends IBaseResource> {

	/**
	 * If the server responds with an <code>HTTP 301 Not Modified</code>,
	 * return the given instance.
	 */
	IReadExecutable<T> returnResource(T theInstance);

	/**
	 * If the server responds with an <code>HTTP 301 Not Modified</code>,
	 * return <code>null</code>.
	 */
	IReadExecutable<T> returnNull();

	/**
	 * If the server responds with an <code>HTTP 301 Not Modified</code>,
	 * throw a {@link NotModifiedException}.
	 */
	IReadExecutable<T> throwNotModifiedException();
}
